Am.  Jour.  Pharin. 
May,  1894. 
Myrica  Asplenifolia. 
219 
was  dissolved  in  commercial  ether,  and  the  filtered  liquid  evaporated 
under  reduced  pressure,  whereby  a  porous  tannin  was  obtained.  The 
yield  was  larger  from  the  leaves  than  from  the  rhizome. 
No  process  of  extracting  and  purifying  these  tannins  could  be 
called  quantitative.  A  weak  solution  of  the  tannin  gave  the  follow- 
ing reactions.  For  comparison  there  are  also  added  the  reactions  of 
the  tannin  of  galls  and  of  canaigre. 
TANNINS  FROM 
Galls, 
dark  blue  ppt. 
Reagents. 
Ferric  chloride,  . 
and 
Ainmon.  hydrate, 
Lead  acetate,    .  . 
Gelatin,     .  .  .  . 
Tartar  emetic, 
and 
Ammon.  chloride. 
Potassium  bichro- 
mate,     .  .  .  . 
Calcium  hydrate, 
Bromine  water,  . 
Uranium  acetate, 
Ferric  acetate. 
Myrica. 
dark  blue  ppt. 
f  brown  ppt., 
brownish-black  ppt.  tpurple  ]iquid< 
whitish  ppt. 
Canaigre. 
green  ppt. 
pinkish  ppt. 
no  change. 
flocculent  ppt. 
yellowish- 
brown  ppt. 
pinkish  ppt., 
darkening. 
yellow. 
brownish- 
red  color. 
blue  ppt. 
white  ppt. 
white  ppt. 
white  ppt. 
same  unchanged, 
brown  ppt. 
ppt.  darkening, 
no  ppt. 
brownish- 
red  color. 
blue  ppt. 
brown  ppt. 
yellowish  ppt. 
yellow  ppt. 
no  change. 
flocculent  ppt. 
greenish-brown 
ppt.,  darkening. 
light  pink  ppt., 
turning  red  and 
brown, 
f  yellow,  then 
1  brown  ppt. 
f  crimson  color, 
I  upon  standing 
j   a  reddish  brown 
I  PPt- 
green  ppt. 
Starch  having  been  detected  in  a  cooled  decoction  of  the  rhizome, 
a  separate  estimation  of  it  was  made  on  the  original  material.  For 
this  purpose  2  grams  of  the  fine  powder  were  boiled  for  six  hours 
with  a  4  per  cent,  alcoholic  solution  of  potassium  hydrate.  The 
residue  was  washed  with  alcohol  till  freed  from  alkali,  and  afterward 
with  water  to  remove  all  coloring  and  soluble  matter.  The  thor- 
oughly washed  starch  granules  and  accompanying  woody  portions 
were  boiled  for  three  hours  with  one  per  cent,  hydrochloric  acid  to 
convert  the  starch  into  glucose,  which  was  estimated  in  the  manner 
described  above.  The  amount  of  starch  which  was  calculated  by 
proportion  from  the  respective  molecular  weights  of  glucose  and 
starch  and  the  amount  of  glucose  obtained,  was  found  to  be  8-24 
per  cent. 
Starch  was  not  found  in  the  leaves. 
